Electrical attachment plug



L. POLLOCK ELECTRICAL ATTACHMENT PLUG Sept. 16 1924 Filed April 24 1919 L. 1 (Z. L

" ATTORNEY Patented Sept. id, 1924.

LEOPOLD POLLOCK. OF NEW YORK, N. Y.

ELECTRICAL ATTACHMENT PLUG.

Application filed April 24, 1919. Serial No. 292,248.

To all whom it may concrm:

Be it known that inter-01.1) PoLLocK, citizen of the lfuited States, and resident of New York city, in the county of New York and State of New "lforln'has invented certain new and nsefui; Improvements in Electrical Attachment Plugs, of which the following is a specification.

This invention relates to electric attachment plugs.

Electric apparatus have been provided with various kinds of contact members some being mainly circular in cross-section and others nminly rectangular. My main ob'ect therefore in this invention is to provi e an attachment plug which may be adapted for use with electric apparatus having various kinds of contact members.

Another object of this invention is to provide an attachment plug of the above character which shall be cliiclent in its operation in providing good contacts with the various contact members differing in shape and size.

A further object of this invention is to provide an attachment plug of this character in which the parts may be easily manufactured and readily assembled and which shall all be held securely in position to provide a strong, lasting and cilicient construction.

Other objects of this invention will appear from the detailed description and the features of novelty will be particularly pointed out in the claim.

In the drawing accompanying this specification and forming a material part thereof,

Fig. 1 is a. plan view of the attachment plug with one half of the insulating casing removed, and showing the metal parts;

F lg. 2 is a crossfl-rciional view taken along line 2--2 of Fig. 1;

Fig. 3 is an end view of the plug assemblcd;

Fig. 4 is an enlarged detailed view of one of the metal comm-t clips as disclosed in Fig. 2;

Fig.5. 5 is a detailed cross-sectional view out along lines 5-4) of .Fig. 4;

Fig. (i is a developed view, showing in plan the blank from which the contact clip is formed; and

Fig. 7 is a cios.--'--sccl'ional view similar to Fig. ."i and showing a modified form of contacting jaw.

Referring in detail to the drawing, the attachment plug, an embodiment of my inapparatus are vention there shown, is seen to consist of an insulating casing 10, made preferably in two parts 11 and 12 held together as by the screws 13. The parts of the basing are each hollowed out adjacent the top as at 14 14 and 15, 1a" to provide a space 16 branching out into receptacles 17, 17' for the lead wires as will be readily understood. The casing halves are further hollowed out as at 18, 18 to provide receptacles 19, 19' for the metal contact clips 20, 20 to be inserted thru the narrowed openings 20.

These contact clips are each formed preferably from one strip of resilient sheet metal ,of desired thickness and formed in two halves 21, 22, each slit as at 23, 23 to mvide four le S or jaws 24. The two ha ves 21, 22 extenf from the narrower and shorter intermediate portion 25. The latter is provided with symmetrically disposed pairs of projections 26,26 and perforations 27', 27'

for fastening means such as the screw 28 for securing the lead wires in the interior of the casing. The blank may be folded over about the line 29 as will be readily understood and the jaws 24 are formed by means of a die or in some other suitable manner to provide the cross-section shown in Fig. 5. Referring to this figure, it will be seen that the cross-sectional contour of the jaws is such as to provide 0 posed longitudinal concave portions 30 w ereby the plug is adapted to receive circular contact members (shown dotted at 30) and the opposed longitudinal convex portions 31, and 32 disposed to either side of said concave circular portion 30, whereby the plug is adapted to receive flat contact members such as the rectangular ones shown dotted at 31' 32'. When the projections 26, 26' are folded over they form guldes and holding members 33, 33' for the lead wires.

In Fig. 7 I have shown a simplified form of jaw member adapted for various kinds of contact members on heatin irons and the like, in which the jaws are al formed con-- vexly circular as at 34. But this form may not afford as good contact for circular contact members as that shown in Fig. 5. In the latter form the concave circular ortions afi'ord a larger circular contact cur ace for circular contact members and inasmuch as most electric heatin irons and the like) rovi ed with circular contact members, 1; is form may be preferable.

It will be readily understood that either of the forms of plug hereinabove described may clip formed from one. piece 0! resilient conalso be used in connection with mutant. memducting material slit and 69 provide hers other than circular or rectangular, since pairsof ion 'tudinal cqfitakxt jaws" haw the jaws will readily ada t themselves to opposeci nsnnvex and cones've mu'fncng, 5 the form of contact mem rs and always sheet hiejing bent at the centertodis' inassi 15 afford some points of cod contact 7 jaws-iii arallel pairs.

Having thus descm d my invention, 1 Si e at New York city, in the county claim as new and desire to secure by Letters of ew York ami State of NW York, this Patent:- E 26th day of'March, A. D. 19%;

10 In an eiectric attachment'p1ug,-a ficnntac't LE 0201.11) Pomocx. 

